Kankakee County Highway 21 is a north-south highway running along the southern banks of the Kankakee River. This runs from Illinois State Route 17 and Kankakee County Highway 22. KCH 21 does not pass through any towns in Kankakee County. KCH 21 intersects the following highways in Kankakee County. Kankakee County Highway 22, near Aroma Park. Illinois State Route 17, near Sun River Terrace.
A guide marker on NB KCH 21 at KCH 22. Looking north along KCH 21 near KCH 22.
